1280040570128 has 20 divisors (see below), whose sum is σ = 2502026206428. Its totient is φ = 634356387840.

The previous prime is 1280040570103. The next prime is 1280040570131. The reversal of 1280040570128 is 8210750400821.

It can be written as a sum of positive squares in 2 ways, for example, as 22161681424 + 1257878888704 = 148868^2 + 1121552^2 .

It is a super-2 number, since 2×1280040570128² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1280040570091 and 1280040570100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353991713 + ... + 353995328.

Almost surely, 2^{1280040570128} is an apocalyptic number.

It is an amenable number.

1280040570128 is a deficient number, since it is larger than the sum of its proper divisors (1221985636300).

1280040570128 is a wasteful number, since it uses less digits than its factorization.

1280040570128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707987162 (or 707987156 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

Adding to 1280040570128 its reverse (8210750400821), we get a palindrome (9490790970949).

The spelling of 1280040570128 in words is "one trillion, two hundred eighty billion, forty million, five hundred seventy thousand, one hundred twenty-eight".